Apparatus for decanting fluids into specially-prepared receptacles.



N0.v91,4ao 'PATENTED JUNE 6, 1905. I E. MAYNARD. APPARATUS FOR DEOANTINGFLUIDS INTO SPEGIALLY PREPARE R EGEPTAOLES. APPLIGATION FILED JUNE 6,1904.

"wfnesses ing at The Plague Research Laboratory, Bom- [bulb 0.

Y U ITED-STAT S PATENT OFFICE.

Patented June 6, 1905.

EDWIN MAYNARD, OF BOMBAY, INDIA.

APPARATUS FOR DECANTING FLUID.

SPECIFICATION forming part of Letters Patent -N0. 791,480, dated J'une6,1905. Application tiihtite, 1904. semi No. 211,393.

To all whom it may concern/.- Be it known that I, EDWIN MAYNARD,residbay, India, have invented certain new, useful,

and Improved Apparatus for Decanting Fluids into Specially-PreparedReceptacles without Exposing the Same to the Risk of to make and use thesame.

My invention consists in improved appara-f tus for decanting fluids intospecially-prepared receptacles without exposing the same to the risk ofcontamination.

The arrangement, construction, and operation of the apparatus will bereadily understood by reference to thedrawing, which shows, partly inelevation, a general" view of the complete apparatus.

a is a glass funnel-shaped tube which is constricted at the pointb andterminates in a Two pieces of glass tubing cZ 0Z are fused into oppositesides of the funnel at the points f, the end of the. upper tubed beingplugged with cotton-wool g or other like and suitable filtering medium.A piece of rubber tube 72. connects the lower tube 0Z with the stockbottle Z, containing sterilized fluid. Another piece of glass tube d isfused into the neck or constricted part Z and connected by rubber tubinglz/with the stock-bottle Z", containing the particular fluid to bedecanted. This vessel is fitted with a filtering-plug, of cotton-wool orthe like, g. A tapering metal thimble j, which is shown in section, actsas a guide, is surrounded by a rubber sleeve is, (also shown in section,the end of which is punctured centrally, so that when the capillary tubeis withdrawn it closes instantly, -so as to be air and water tight. Thethimble being forced into the funnel supports. and keeps in position ametallic breaker m and at the same time forms a water-tight joint. Thisbreaker consists of a split piece of tube slightly curved downwardtoward its end n and having a collar 0, formed, as shown, by filing orcutting away the tube on either side of it. This split tube is solderedinto a cirelastic joint when the thimble is forced up to its seat in themanner described. Both the sealing-plate p and the rubber washer'q areshown in section to render the action clearer.

At a suitable point in the funnel-shaped tube a rubber washer 9" (shownin section) of special construction is mounted. It is perforatedcentrally; but the hole does not quite pass throughthe washer,.beingonly large enough to admit the capillary tube 24 of the receptacle t. Aslight puncture through the remaining thickness of thewasher is madewith a sharp knife, so that a close and airtight joint is secured whenthe tube is. forced or washer may be kept sterilized. The receptacleemployed with this form of my improved apparatus consists of a tube,preferably of glass, t, one end of which is drawn down into a longcapillary tube at. This receptacle is exhausted, the end sealed OE andslightly nicked with a glass-knife near. the

end to enable the same to be readily. ruptured when forced into thebreaker m, curved at its upper end a, as shown. The receptacle issterilized in a suitable sterilizing-box.

In arranging the decanting apparatus it is important that the vessel Z,containing the fluid to be decanted, should be at a sufficient -heightabove the vessel Z, containing the sterilizing fluid, so that itsadditional statical pressure may tend to press together the puncturedend of the sleeve and assist in prevent ing the contents of vessel Zpassing into the bulb 0, since the sterilized chamber is filled fromthis vessel to the line a Z.

In some cases I may dispense with the sterilized chamber w, branch tubes0? OZ, and vessel Z. I prefer to place a pinch-cock at the point 0 03,so that the fluid from vessel Z may be regulated so as to pour into thechamberw at such a rate as to be carried off by the capillary tube .9without rising above line a b.

The operation of my invention is as fol lows: The fluid to be decanted,from which contaminated air is excluded, flows into the bulbous part ofthe apparatus 0 from the stock vessel Z by tube d, and, on the otherhand, the sterilized fluid contained in the vessell flows by pipe dinto'the intervening space w between the thimble j and the washer r. Thesealed end o of the receptacle t, which is to be charged and which inthis particular form of my apparatus is preferably of the shape shownand described, is passed through washer 1' and guided by thimble jthrough the rubber sleeve is into the breaker m. As it is forced alongit encounters the collar 0 and curved end of the breaker a, which breaksit ofl, as shown at o, the broken piece falling into the bulb, thenicking of the tube with a knife or file assisting this result. Thereceptacle now fills with the serum or other preparation it is desiredto keep free from contamination and is withdrawn from the apparatus andsealed.

The apparatus shown and described is more particularly suited forfilling small vessels with preparations employed for medical or surgicalpurposes. I do not, however, limit myself to such use, as by increase insize of the cooperating parts it can be adapted for bottling milk,dietetic, and other preparations free from risk of germ or bacterialcontamination.

After the receptacle is sealed off the contents may be tested by closingoff a piece from the capillary tube by means of the blowpipe withouteifecting the bulk contained in the vessel 25.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is

1. In apparatus for decanting fluids free from germ contamination thecombination with a funnel-shaped chamber having a depending bulb andrubber-jointed tube connecting said bulb with a vessel containing thefluid to be decanted and means for closing the mouth of said vessel by afiltering-plug for exeluding contaminated air, of a breaker having. adownwardly-bent extremity and collar, passing into said bulb and theperforated rubber washer forming a liquid-tight seat for said breaker, atapering and perforated guidingthimble surrounded by a rubber sleeve forholding the breaker in position, a central chamber filled withsterilizing fluid, the air-tube closed with a filtering-plug and fusedinto said chamber, a depending tube fused into the under side of saidcentral chamber and connecting it with a vessel containing sterilizedfluid, the mouth of which is closed with a fllterplug, the perforatedwasher for closing the open end of the central chamber and the capillarytube in said washer substantially as described.

2. The combination with apparatus for decanting fluids free from germcontamination fitted with a funnel-shaped central chamber having adepending bulb and breaker mounted therein, of a vessel containing thefluid to be decanted, and a vessel containing sterilizing fluid, andmeans for connecting said vessels with the bulb and the central chamber,substantially as described.

3. In apparatus for decanting fluids free from germ contamination thecombination with a central chamber fitted with an air-tube andterminating in a bulb connected to the vessel containing the fluid to bedecanted of the washer fitted with a capillary tube for maintainingcirculation of the sterilizing fluid supplied to saidchamber from thecontaining vessel by the rubber-jointed tube fused into said chamber andconnected to said vessel substantially as described.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

EDWIN MAYNARD.

Witnesses:

P. BYRNE, VENAYAK MADURov.

